Electromagnetic spark ignition



Sept. 25, 1934. K. scHAFl-'LER-GLSSL 1,974,490

' ELECTROMAGNETIC SPARK IGNITION APPARATUS Filed Feb. 2l, 1955 F/G. i.

'Patented sept.25,1934 1 I 1,974,490

I ELECTRMAGNETIC SPARK IGNITION APPARATUS Konrad SchafHer-Glssl, Vienna,Austria Application February 21, 1933, Serial No. 657,779 In AustriaApril 16, 1932 3 Claims. (Cl. 1'75-115) This invention relates to anelectro-magnetic ends of the electrodes are bent ofi so as to face sparkignition apparatus, particularly for use each other and are normallyseparated by a with crude oil, and of the kind comprising a pair sparkgap 3. On the magnet coil 1 being eneroi spark electrodes one of whichis movable and gized, an axial movement will be imparted to the `icontrolled by an electro-magnet for intermittent rod 5 through themedium of the armature, and 60 contact with the companion electrode. bythe action of the head on the bracket 8, the

In known devices of this kind the movable elecelectrode 9 will be rockedso as to strike against trode is controlled by springs the action ofwhich the electrode l0. As the rod moves it engages has to be overcomeby the magnet, and the imthe contact spring 13 and separates it from thei() pact with which the electrodes meet is therefore stud 2 so that themagnet circuit will be broken. 05 insuniciently strong to maintain thecontact The rod then drops and allows the electrodes to points free fromcarbon deposits when the appaseparate, thereby producing a spark or, ifthe curratus is employed for the ignition of crude oil rent be strongenough, an arc in the gap 3. As vapours. the rod drops, the magnetcircuit will again be i5 The object of the present invention is toobclosed and the operation repeated, the device act- ,70

' tain an arrangement capable of maintaining the ing as an automaticinterrupter.

contact points perfectly free from carbon dein the illustratedarrangement the arm of the posits, and the invention consists broadly inemelectrode 9 is made comparatively thin and resilploying a pair ofrod-shaped electrodes one of ient and it will therefore spring back byelastic which is pivoted and adapted to strike against reaction underthe impact made on the electrode 75 the companion electrode under theiniiuence of 1U. This happens just after the magnet circuit a magnet theaction of which is strengthened by has been broken, and the separationof the electhe provision of an armature carrying part of `trodes willtherefore be very rapid, and a powerthe magnet core, the electrodesbeing resilient ful spark will be produced. A separate spring 53g andadapted to separate by elastic reaction on for the separation of theelectrodes will be obvi- 80 making impact with each other. ated by thearrangement. Naturally both elec- The magnet may act on the movableelectrode trodes can be made sprngy instead of only one. through themedium of a rod which passes aX- A further advantage obtained by thearrangeially through the magnet and carries the armament is that thearmature forms part of the core 3e ture, the electrode being pivoted andiitted with and that it will move in a straight line in the axial abracket engaged by a head on the rod. direction of the magnet. It willtherefore work Fig. 1 of the accompanying drawing represents in a verystrong magnetic ield with an air space a vertical section of anapparatus according to of minimum dimensions between it and the pole theinvention, and pieces. and a very strong magnetic action will be -35 Fg-2 iS a CTOSS-SECOD On the line II-II 0f obtained by a comparativelysmall magnet. The 90 Fig. 1. strong magnetic action will keep thecontact The apparatus COIYIDTSGS 9 Casing CODaning a surfaces of theelectrodes free from carbon demagnet coil l, a relatively short magnetcore 4, @site and an armature 6 which forms a complementary I Claim;

part of the core. The armature is connected to 1 An e1eetre magiieiieSpark ignition appaa rod 5 which passes axially through the magnet fetusof the Character described, Comprising e,

core and which is movable in axial direction, the support, e pair efgermany seperated red sheped I'Od being guided in a metau Sleeve '7 andin spark electrodes connected, one rigidly and the an insulating SIBBVG12- A COl Spring 11 iS DI'O- other pivotally, to said support, anelectro-mag- Vded 0n WhCh the armature and I'Od are nO- net in saidsupport, a relatively short core in said 100 mally SUDDOIS in DOSDOn t0be InOVed by the' magnet, an armature forming a complementary magnet.The circuit of the magnet coil contains pari; of Said Cei-e, Connectionbetween Seid armeda COIlaC Spring 13 WhCh traverses the OD end ture andthe pivoted electrode adapted to cause of the rod 5 and which normallymakes contact the latter to strike against the rigid electrode on .5ewith a stud 2 for closing the circuit. The ignithe magnet beingenergized, the electrodes being 105 tion circuit comprises tworod-shaped electrodes resilient and adapted to separate by elastic reac-9 and 10 the latter of which is rigidly secured to tion on making impactwith each other. the casing. The electrode 9 is connected to a 2. Astructure as claimed in claim 1 wherein fork bracket 8 which is pivotedat 14 and which the connection between the armature and the 55 engagesloosely a head on the rod 5. The free pivoted electrode comprises aheaded rod ar- 110 armature so as to be moved axially thereby on themagnet being energized, a bracket on the pivoted electrode, a head onsaid rod engaging loosely with said bracket and operative to turn thepivoted electrode into contact with the rigid electrode when the rod ismoved by the magnet, and avcontact spring arranged in the circuit of theelectro-magnet and in thepath of said rod so as to be acted upon by thelatter for breaking the circuit when the rod is operated, the electrodesbeing resilient and adapted to be separated by elastic reaction onmaking impact with each other.

KONRAD sCHAFFLER-GLSSL.

